US9762431B2 - Communication device, on-vehicle communication system, and inspection method - Google Patents
Communication device, on-vehicle communication system, and inspection method Download PDFInfo
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- US9762431B2 US9762431B2 US14/364,036 US201214364036A US9762431B2 US 9762431 B2 US9762431 B2 US 9762431B2 US 201214364036 A US201214364036 A US 201214364036A US 9762431 B2 US9762431 B2 US 9762431B2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/66—Data transfer between charging stations and vehicles
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0631—Management of faults, events, alarms or notifications using root cause analysis; using analysis of correlation between notifications, alarms or events based on decision criteria, e.g. hierarchy, tree or time analysis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2221/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof covered by H01L21/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
Definitions
- the present application relates to a communication device provided with a pair of communication lines, an on-vehicle communication system including the communication device and an inspection method using the communication device.
- electric vehicles and hybrid vehicles each of which is equipped with devices such as a motor and a battery, and runs by driving the motor with electric power stored in the battery, have come to be widespread.
- An electric vehicle charges a battery by feeding power from an external power feeding device.
- a plug-in hybrid vehicle which enables its battery to be charged from an external power feeding device has been put in practical use.
- the external power feeding device corresponds to a power feeding device installed in facilities such as general houses and commercial power feeding stations. In feeding power from the power feeding device to a vehicle, a plug at the tip end of a charge cable connected to the power feeding device becomes connected to a feed port provided at a vehicle as a power receiving connector. Power is then fed from the power feeding device to the vehicle through a feed line enclosed in the charge cable to charge a battery.
- the charge cable also encloses wiring other than the feed line, e.g., a ground line and a control line.
- the control line is wiring used to transmit control signals such as a control pilot signal used for feed control of an electric storage device.
- standardization of communication such as power line communication has been in progress, in which communication is performed between a vehicle and a power feeding device by superimposing communication signals using a feed line as a medium.
- standardization has also been in progress not only for power line communication but also for other types of communication such as in-band communication for transmitting and receiving signals between a vehicle and a power feeding device by superimposing communication signals onto control signals using a control line as a medium (see SURFACE VEHICLE RECOMMENDED PRACTICE, J1772, October 1996 (Revised in January 2010), Society of Automotive Engineers, Inc., for example).
- a superimposition/separation unit In communication such as power line communication and in-band communication, a superimposition/separation unit using a transformer provided with a primary coil and a secondary coil for wiring such as a feed line, a ground line and a control line.
- the superimposition/separation unit superimposes and separates communication signals input/output from a communication device connected through a communication line onto/from wiring so as to perform communication between a vehicle and a power feeding device.
- abnormality may occur in a communication line in a communication device, such as open fault, supply fault and ground fault, which may have various problems in detection thereof.
- open fault such as disconnection of a communication line
- ground fault which also requires to assume the possibility of another abnormality occurring somewhere other than the communication line, resulting in cumbersome work.
- An object of the application is to provide a communication device, an on-vehicle communication system and an inspection method that facilitate inspection and detection of occurrence of abnormality by connecting a communication line to the first reference potential and the second reference potential through a resistance.
- the communication device is characterized by including a first resistance connected to a first reference potential from a midway point of one of a pair of communication lines connected to a coil, a second resistance and a third resistance arranged in series so as to be connected to a second reference potential different from the first reference potential from a midway point of the other one of the pair of communication lines, and a switch opening and closing between the first resistance and the first reference potential.
- the communication device is characterized by including a detection means for detecting a potential between the second resistance and the third resistance when the switch is closed, and an inspection means for inspecting abnormality based on the potential detected by the detection means, the first reference potential and the second reference potential, as well as resistance values of the first resistance, the second resistance and the third resistance.
- the communication device is characterized by including a fourth resistance connected to the second reference potential from a point between the first resistance and the switch.
- the communication device is characterized by including a sum of resistance values of the first resistance and the fourth resistance is approximately equal to a sum of resistance values of the second resistance and the third resistance.
- the communication device is characterized by including a terminal resistance connected to the pair of communication lines, wherein a sum of resistance values of the first resistance, the second resistance, the third resistance and the fourth resistance is larger than a resistance value of the terminal resistance.
- the on-vehicle communication system is the on-vehicle communication system performing communication with a device inside and outside a vehicle through in-vehicle wiring used to feed power to an electric storage device mounted on the vehicle, characterized by including the communication device according to the present invention, performing input/output of a communication signal concerning communication, and a superimposition/separation unit superimposing/separating a communication signal trough the in-vehicle wiring, wherein the superimposition/separation unit includes a primary coil connected to the in-vehicle wiring, and a secondary coil electromagnetically coupled to the primary coil, and wherein the coil to which the pair of communication lines are connected is the secondary coil included in the superimposition/separation unit.
- the inspection method is the inspection method for inspecting abnormality in a pair of communication lines connectable to a coil, for a communication device provided with the communication lines, characterized in that the communication device executes the steps of closing the switch, detecting a potential between the second resistance and the third resistance when the switch is closed, inspecting abnormality based on the detected potential, the reference potentials, and resistance values of the first resistance, the second resistance and the third resistance, and recording and/or outputting a result of inspection.
- the voltage of a reference potential is divided to the respective resistances in accordance with the situation of abnormality.
- abnormality can be inspected based on the potential between the second resistance and the third resistance.
- the reference values from the second reference potential with respect to a pair of communication lines may be set to be approximately equal to each other.
- the resistance values of the first, second, third and fourth resistances are adjusted to prevent communication signals from leaking to the sides of the resistances.
- the voltage of the reference potential divided to each resistance is changed, since the connection state of the circuit changes in accordance with the state of abnormality.
- abnormality such as an open fault, a supply fault or a ground fault may be detected based on the potential between the second resistance and the third resistance to facilitate the inspection and detection of abnormality, providing beneficial effects.
- the resistance values from the second reference potential to a pair of communication lines may be set to be approximately equal to each other, so that an adverse effect on communication can be eliminated even when a circuit related to the present application is added, providing beneficial effects.
- the sum of the resistance values of the first, second, third and fourth resistances is set larger than the terminal resistance, so as to prevent communication signals from leaking to the side of the first to fourth resistances, providing beneficial effects.
- FIG. 1 is an explanatory view illustrating a configuration example of an on-vehicle communication system according to the present application
- FIG. 2 is an explanatory view illustrating a configuration example of an on-vehicle communication system according to the present application
- FIG. 3 is a block diagram illustrating a configuration example of a communication device included in the on-vehicle communication system according to the present application
- FIG. 4 is an explanatory view illustrating a modification of the on-vehicle communication system shown in FIG. 2 ;
- FIG. 5 is a block diagram illustrating a configuration example of the communication device in the on-vehicle communication system shown in FIG. 4 ;
- FIG. 6 is a flowchart illustrating an example of processing of abnormality inspection for the communication device included in the on-vehicle communication system according to the present application.
- FIG. 7 is a table illustrating a determination example of an abnormal state of the communication device included in the on-vehicle communication system according to the present application.
- FIG. 1 is an explanatory view illustrating a configuration example of an on-vehicle communication system according to the present application.
- FIG. 1 shows an example where the present application is applied to the case where power is supplied from a power feeding device 2 such as a charging stand to a battery (a storage) 10 included in a vehicle 1 such as an electric vehicle and a plug-in hybrid vehicle.
- a power feeding device 2 such as a charging stand
- a battery (a storage) 10 included in a vehicle 1 such as an electric vehicle and a plug-in hybrid vehicle.
- the vehicle 1 and the power feeding device 2 may be connected with each other through a charge cable 3 .
- the charge cable 3 encloses therein two feed lines 31 and 32 used as power supply lines, a ground line 33 which is conductive wire for grounding, and a control line 34 transmitting control signals such as a control pilot signal (CPLT) used for charge control.
- One end of the charge cable 3 is connected to the power feeding device 2 side, while the other end thereof may be connected to a receiving connector 11 disposed as an on-vehicle feed port on the vehicle 1 side.
- the feed lines 31 and 32 are AC lines to which alternating voltage is applied.
- the control line 34 is a signal line transmitting and receiving control signals such as a control pilot signal.
- the feed lines 31 and 32 may also be used as media for transmitting management information such as vehicle authentication, charging management and billing management as well as various other information.
- the vehicle 1 is able to communicate with the power feeding device 2 by superimposing and separating communication signals onto/from the feed lines 31 and 32 .
- the power feeding device 2 includes a power supply part 20 supplying alternating power, a charge control part 21 performing communication concerning charge control, a communication part 22 performing input/output of communication signals, and a superimposition/separation part 23 superimposing and separating communication signals, which are input and output to/from the communication part 22 , onto/from the feed lines 31 and 32 .
- the power supply part 20 is connected to one end of each of the feed lines 31 and 32 .
- the charge control part 21 is connected to one end of the control line 34 .
- the wiring in the power feeding device 2 corresponds to internal conductive wire serving as extended lines connected to the feed lines 31 , 32 , ground line 33 and control line 34 enclosed in the charge cable 3 outside the power feeding device 2 .
- the part of the extended lines disposed as the internal conductive wire will also be described as feed lines 31 , 32 , ground line 33 and control line 34 for convenience.
- the charge control part 21 is, for example, a circuit on the output side which conforms to the International Standard related to charge control, and performs charge control in various states, such as confirmation of connection and start of energization, by transmitting and receiving control signals such as a control pilot signal.
- the superimposition/separation part 23 is connected to branch lines branched from the feed lines 31 and 32 , and is configured with a circuit such as a capacitor or a coupling transformer (circuit such as a signal transformer of the electromagnetic induction type), which is connected to the branch lines.
- the superimposition/separation part 23 superimposes various communication signals output from the communication part 22 onto the feed lines 31 and 32 , and inputs various communication signals separated from the feed lines 31 and 32 , so as to perform power line communication using the feed lines 31 and 32 as media.
- the capacitor has high impedance for alternating-current (AC) power supplied through the feed lines 31 and 32 , whereas it has low impedance for communication signals using a band for low-speed communication of several tens to several hundreds of kHz or a band for high-speed communication of several MHz to several tens of MHz.
- the capacitor passes the signals in the frequency band used for communication signals while blocking off the signals in the frequency band used for AC power in the transmission path branched from the feed lines 31 and 32 .
- the vehicle 1 includes, in addition to the battery 10 and the receiving connector 11 , a charging device 12 for charging the battery 10 , a charge control device 13 performing communication concerning charge control, a communication device 14 performing transmission and reception of communication signals, and a superimposition/separation unit 15 performing superimposition and separation of communication signals onto/from the pair of feed lines 31 and 32 .
- in-vehicle wiring is disposed which is connected to the feed lines 31 , 32 , ground line 33 and control line 34 .
- the in-vehicle wiring connected to the feed lines 31 and 32 are AC lines connected to the charging device 12 , which charges the battery 10 .
- the in-vehicle wiring connected to the ground line 33 is body-earthed.
- the in-vehicle wiring connected to the control line 34 is connected to the charge control device 13 through an extended line.
- each in-vehicle wiring, AC lines and extended lines are also described as the feed lines 31 , 32 , ground line 33 and control line 34 for convenience, unless they need to be specifically identified.
- the superimposition/separation unit 15 is connected to a pair of branch lines branched from the in-vehicle wiring connected to the feed lines 31 and 32 .
- the charge control device 13 is, for example, a circuit on the input side which conforms to the International Standard related to charge control, and performs charge control in various states, such as confirmation of connection and start of communication, by transmitting and receiving control signals such as a control pilot signal.
- the communication device 14 includes a function for transmitting and receiving various communication signals to/from the power feeding device 2 , and is connected to the superimposition/separation unit 15 through a pair of communication lines.
- the superimposition/separation unit 15 is a circuit such as a coupling transformer (signal transformer of the electromagnetic induction type) provided with a primary coil 150 , both ends of which are connected to the feed lines 31 and 32 through a capacitor, and a secondary coil 151 electromagnetically coupled to the primary coil 150 . It is noted that both ends of the secondary coil 151 are connected to a pair of communication lines in the communication device 14 .
- a coupling transformer signal transformer of the electromagnetic induction type
- the capacitor has high impedance for AC power supplied through the feed lines 31 and 32 , whereas it has low impedance for communication signals using a band for low-speed communication of several tens to several hundreds of kHz or a band for high-speed communication of several MHz to several tens of MHz.
- the capacitor passes the signals in the frequency band used for communication signals while blocking off the signals in the frequency band used for AC power in the transmission path branched from the feed lines 31 and 32 .
- the superimposition/separation unit 15 superimposes various communication signals onto the feed lines 31 and 32 , and separates the superimposed various communication signals.
- the superimposition/separation unit 15 superimposes various communication signals output from the communication device 14 onto the feed lines 31 and 32 , and inputs various communication signals separated from the feed lines 31 and 32 , so as to perform power line communication using the feed lines 31 and 32 as media.
- a loop circuit is formed in which communication signals are transmitted by the superimposition/separation circuit 15 , feed lines 31 , 32 , superimposition/separation part 23 as well as other wiring, elements and circuits. This allows power line communication which superimposes communication signals onto the feed lines 31 and 32 to be implemented between the communication device 14 in the vehicle 1 and the communication part 22 in the power feeding device 2 .
- FIG. 2 is an explanatory view illustrating a configuration example of an on-vehicle communication system according to the present application.
- FIG. 2 illustrates another form different from the example shown in FIG. 1 , and illustrates an example where the present example is applied to in-band communication. It is noted that configuration parts similar to those shown in FIG. 1 are denoted by the same reference codes and will not be described in detail, while reference is to be made to the description of the similar parts.
- a superimposition/separation part 23 included in the power feeding device 2 is connected to branch lines branched from the ground line 33 and control line 34 .
- the superimposition/separation part 23 superimposes various communication signals output from the communication part 22 onto the ground line 33 and control line 34 , and inputs various communication signals separated from the ground line 33 and control line 34 , so as to perform in-band communication using the ground line 33 and control line 34 as media.
- the superimposition/separation unit 15 included in the vehicle 1 is connected to branch lines branched from the ground line 33 and control line 34 .
- the superimposition/separation unit 15 is a circuit such as a coupling transformer provided with a primary coil 150 , both ends of which are connected to the ground line 33 and control line 34 , and a secondary coil 151 electromagnetically coupled to the primary coil 150 . It is noted that both ends of the secondary coil 151 are connected to a pair of communication lines in the communication device 14 .
- the superimposition/separation unit 15 superimposes various communication signals onto the ground line 33 and control line 34 , and separates the superimposed various communication signals therefrom.
- the superimposition/separation unit 15 superimposes various communication signals output from the communication device 14 onto the ground line 33 and control line 34 , and inputs various communication signals separated from the ground line 33 and control line 34 to the communication device 14 , so as to perform in-band communication using the ground line 33 and control line 34 as media.
- a loop circuit is formed in which communication signals are transmitted by the superimposition/separation circuit 15 , ground line 33 , control line 34 , superimposition/separation part 23 as well as other wiring, elements and circuits.
- This allows in-band communication which superimposes communication signals onto the ground line 33 and control line 34 to be implemented between the communication device 14 in the vehicle 1 and the communication part 22 in the power feeding device 2 .
- FIG. 3 is a block diagram illustrating a configuration example of the communication device 14 included in the on-vehicle communication system according to the present application.
- the communication device 14 includes a CPU (Central Processing Unit) 141 as a control part controlling the entire device, while a memory 142 is connected to the CPU 141 as a storage part storing various kinds of information used in execution of processing performed by the CPU 141 .
- CPU Central Processing Unit
- the communication device 14 includes a pair of OFDM (Orthogonal Frequency Division Multiplexing) lines connected to both ends of the secondary coil 151 of the superimposition/separation unit 15 , and a pair of internal writing connected to the OFDM lines.
- the internal wiring is connected to a Tx protection circuit 143 functioning as a transmission part outputting various signals such as communication signals and to an Rx filter 144 functioning as a reception part to which various signals are input.
- the Rx filter 144 is provided with a terminal resistance Rr connected to the pair of internal wiring.
- an AFE (Analog Front End) circuit 145 is disposed in the Tx protection circuit 143 and Rx filter 144 , to perform A/D conversion of communication signals.
- the pair of OFDM lines and internal wiring are also indicated as a pair of communication lines 14 a and 14 b.
- the communication device 14 includes a CAN (Controller Area Network) transceiver circuit 146 connected to an in-vehicle communication network NW such as a CAN bus based on the communication standard like CAN disposed in the vehicle 1 .
- the communication device 14 is able to communicate with an output part 16 such as various ECUs disposed in the vehicle 1 through the in-vehicle communication network NW, and makes the output part 16 output, for example, the display of cautions, lighting of various LEDs and ringing of alarming sound.
- the first branch line is connected to the midway of one communication line 14 a among the pair of communication lines 14 a and 14 b , and is connected to the first reference potential through the first resistance R 1 and switch element Q 1 connected in series.
- the switch element Q 1 is a semiconductor switch such as a MOSFET and a bipolar transistor, and is opened and closed upon control by the CPU 141 . It is assumed here that a reference voltage V ref which is equal to or less than a power supply voltage V +B is set as the first reference potential (V ref ⁇ V +B ).
- the CPU 141 closes the switch element Q 1 and applies the reference voltage V ref when inspection is performed for abnormality concerning the communication lines 14 a and 14 b.
- the fourth resistance Ra is connected between the first resistance R 1 and the switch element Q 1 as a pull-down resistance connected to the second reference potential.
- the second reference potential is a potential different from the first reference potential. It is assumed here that a ground voltage V GND is set as the second reference potential. It is also possible to appropriately apply a bias voltage as the second reference potential, not limited to the ground voltage V GND .
- open/close switch for connecting and disconnecting the circuit is used as the switch element Q 1 here, another switch may also be used, which is normally connected to the fourth resistance R and which comes to be connected to the reference voltage V ref at the abnormality inspection.
- the second branch line different from the first branch line is connected.
- the second branch line is connected to the second reference potential through the second resistance R 2 and the third resistance R 3 connected in series.
- the CPU 141 includes an ADC (Analog to Digital Converter) 141 a as a detection means for detecting the potential between the second resistance R 2 and the third resistance R 3 .
- ADC Analog to Digital Converter
- each resistance It is preferable to set the sum (R 1 +Ra) of the resistance value (R 1 ) of the first resistance R 1 and the resistance value (Ra) of the fourth resistance Ra disposed in series between one communication line 14 a and the ground voltage to be approximately equal to the sum (R 2 +R 3 ) of the resistance value (R 2 ) of the second resistance R 2 and the resistance value (R 3 ) of the third resistance R 3 disposed in series between the other communication line 14 b and the ground voltage.
- FIG. 4 is an explanatory view illustrating a modification of the on-vehicle communication system shown in FIG. 2 . Note that the configuration parts similar to those shown in FIG. 2 are denoted by the same reference codes and will not be described in detail.
- the vehicle 1 includes the superimposition/separation unit 15 inside the communication device 14 (see FIG. 5 ) while the power feeding device 2 includes the superimposition/separation part 23 inside the communication part 22 .
- FIG. 5 is a block diagram illustrating a configuration example of the communication device 14 in the on-vehicle communication system in FIG. 4 . It is noted that each of the configuration parts shown in FIG. 5 has a function similar to that shown in FIG. 3 , and the configuration parts similar to those in FIG. 3 will be described with the same reference codes.
- the communication device 14 includes a CPU 141 as a control part controlling the entire device, and a memory 142 is connected to the CPU 141 as a storage part storing various information using execution of the processing performed by the CPU 141 . Furthermore, the communication device 14 includes a CAN transceiver circuit 146 connected to the in-vehicle communication network NW such as a CAN bus based on the communication standard such as the CAN disposed in the vehicle 1 .
- the superimposition/separation unit 15 is included inside the communication device 14 .
- the superimposition/separation unit 15 is a circuit such as a coupling transformer provided with a primary coil 150 , both ends of which are connected to the ground line 33 and control line 34 , and a secondary coil 151 electromagnetically coupled to the primary coil 150 .
- the both ends of the secondary coil 151 of the superimposition/separation unit 15 are connected to a pair of communication lines 14 a and 14 b inside the communication device 14 .
- the first branch line is connected to the midway of one communication line 14 a among the pair of communication lines 14 a and 14 b , the first branch line being connected to the first reference potential (reference potential V ref ) through the first resistance R 1 and switching element Q 1 connected in series.
- the fourth resistance Ra is connected between the first resistance R 1 and the switching element Q 1 as a pull-down resistance connected to the second reference potential.
- the second branch line different from the first branch line is connected to the midway of the other communication line 14 b , the second branch line being connected to the second reference potential (ground voltage V GND or an appropriate bias voltage) through the second resistance R 2 and the third resistance R 3 connected in series.
- each resistance shown in FIG. 5 is set to be, for example, similar to the resistance value shown in FIG. 3 .
- the configuration eliminates the adverse effect on the communication using the communication lines 14 a and 14 b as media, i.e. transmission of high-frequency communication signals, due to disruption in balance between electrical elements such as the potential between the pair of communication lines 14 a and 14 b as well as the resistance values.
- the configuration in FIG. 2 has the superimposition/separation unit 15 and superimposition/separation part 23 outside the communication device 14 in the vehicle 1 and outside the communication part 22 in the power feeding device 2 , respectively, while the configuration in FIG. 4 has the superimposition/separation unit 15 and superimposition/separation part 23 inside the communication device 14 and the communication part 22 , respectively. It is, however, possible to appropriately combine these configurations.
- the superimposition/separation unit 15 may be located inside the communication device 14 whereas the superimposition/separation part 23 may be located outside the communication part 22 .
- the superimposition/separation unit 15 may also be located outside the communication device 14 whereas the superimposition/separation part 23 may be located inside the communication part 22 . Furthermore, when the superimposition/separation unit 15 is located outside the communication device 14 , a part or the whole of the superimposition/separation unit 15 may be integrated with the receiving connector 11 .
- FIG. 4 illustrated the configuration in which the communication device 14 internally including the superimposition/separation unit 15 and the communication part 22 internally including the superimposition/separation part 23 are connected to the ground line 33 and the control line 34 , respectively, it is also possible, as a modification of the on-vehicle communication system illustrated in FIG. 1 , to connect one or both of the communication device 14 internally having the superimposition/separation unit 15 and the communication part 22 internally having the superimposition/separation part 23 to the feed lines 31 and 32 .
- an LPF Low Pass Filter
- Such an LPF can be inserted into one or both of the ground line 33 and control line 34 .
- it can be inserted between the branch part where the control line 34 is branched to the charge control part 21 and the charge control part 21 , or between the branch part where the control line 34 is branched to the charge control device 13 and the charge control device 13 .
- the LPF may be included inside the charge control part 21 and the charge control device 13 , or may be included inside the communication part 22 and the communication device 14 .
- the receiving connector 11 may integrally be formed with the LPF.
- FIG. 6 is a flowchart illustrating an example of processing of abnormality inspection for the communication device 14 included in the on-vehicle communication system according to the present application.
- the processing of abnormality inspection is the processing of inspecting whether or not abnormality such as open fault, supply fault or ground fault occurs in the communication lines 14 a and 14 b .
- the communication device 14 starts the processing of abnormality inspection by using, as a trigger, a predetermined timing such as when the transition is made from the idling period before communication such as power line communication or in-band communication is started to the communication processing, or when a human-induced operation concerning the abnormality inspection is accepted.
- the CPU 141 detects the potential between the second resistance R 2 and the third resistance R 3 at the ADC circuit 141 a while the switch element Q 1 is closed (step S 2 ).
- the CPU 141 then records the result of inspection (step S 4 ) and outputs the recorded inspection result (step S 5 ).
- the inspection result is recorded in the memory 142 .
- the recorded inspection result can appropriately be read out as, for example, a maintenance.
- the output of the inspection result is performed by, for example, outputting a predetermined command to the output part 16 .
- the output part 16 executes the output by, for example, displaying caution, lighting various LEDs and ringing alarm sound for the user's recognition. It is also possible to execute the output when the result of inspection is abnormal. Accordingly, the processing of abnormality inspection for the communication device 14 is executed.
- the result of inspection may also be output, as an abnormality signal, to various other devices and circuits inside and outside the vehicle 1 , not only to the output unit 16 .
- FIG. 7 is a table illustrating a determination example of an abnormal state of the communication device 14 included in the on-vehicle communication system according to the present application.
- the left side in the drawing shows the state of the communication lines 14 a and 14 b to be inspected, whereas the right side shows the detection result of the potential detected by the ADC circuit 141 a .
- the open fault indicates an abnormality such as disconnection of the communication lines 14 a and 14 b .
- the supply fault indicates an abnormality such as short-circuiting and the like between the communication lines 14 a , 14 b and the power supply voltage (V +B ) line.
- the ground fault indicates an abnormality such as short-circuiting between the communication lines 14 a , 14 b and the ground.
- the ground voltage V GND is set as 0 V.
- the potential detected by the ADC circuit 141 a (ADC circuit input voltage value) is R 3 /(R 1 +R 2 +R 3 ) ⁇ V ref .
- the potential In the case of the open fault, the potential will be zero.
- the potential In the case of the supply fault, the potential will be R 3 /(R 2 +R 3 ) ⁇ V +B .
- the potential In the case of the ground fault, the potential will be zero.
- the inspection on the presence/absence and the type of abnormality can be inspected based on the detected potential, power supply voltage V +B , reference voltage V ref , ground voltage V GND as well as the resistance values (R 1 , R 2 , R 3 ) of the first resistance R 1 , second resistance R 2 and third resistance R 3 .
- the inspection method of the present invention may also be applied to the communication device on the power feeding device side, not on the vehicle side. It can further be applied to various fields, for example, to a system other than the system related to a vehicle.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Sustainable Energy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
Description
Claims (11)
Applications Claiming Priority (3)
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JP2011-269393 | 2011-12-08 | ||
JP2011269393 | 2011-12-08 | ||
PCT/JP2012/081669 WO2013084998A1 (en) | 2011-12-08 | 2012-12-06 | Communication device, vehicle-mounted communication system, and inspection method |
Publications (2)
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US20140355452A1 US20140355452A1 (en) | 2014-12-04 |
US9762431B2 true US9762431B2 (en) | 2017-09-12 |
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US14/364,036 Expired - Fee Related US9762431B2 (en) | 2011-12-08 | 2012-12-06 | Communication device, on-vehicle communication system, and inspection method |
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US (1) | US9762431B2 (en) |
EP (1) | EP2789509B1 (en) |
JP (1) | JP5976674B2 (en) |
CN (1) | CN104105623B (en) |
WO (1) | WO2013084998A1 (en) |
Families Citing this family (11)
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US9678131B2 (en) * | 2014-05-27 | 2017-06-13 | GM Global Technology Operations LLC | Method and apparatus for short fault isolation in a controller area network |
EP3034350A1 (en) * | 2014-12-17 | 2016-06-22 | Delphi Technologies, Inc. | Safety method for use in charging electric vehicles |
JP2017039369A (en) * | 2015-08-19 | 2017-02-23 | 株式会社オートネットワーク技術研究所 | On-vehicle connector pair |
JP6694325B2 (en) * | 2016-05-19 | 2020-05-13 | 本田技研工業株式会社 | Vehicle control system |
JP6586396B2 (en) * | 2016-06-17 | 2019-10-02 | 株式会社オートネットワーク技術研究所 | COMMUNICATION DEVICE, CHARGE COMMUNICATION SYSTEM, TRANSPORTATION DEVICE, AND FAILURE DIAGNOSIS METHOD |
CN107732985B (en) * | 2016-08-10 | 2019-11-29 | 宁德时代新能源科技股份有限公司 | Distributed battery management system |
JP6512205B2 (en) * | 2016-11-14 | 2019-05-15 | トヨタ自動車株式会社 | Communications system |
DE102017200421A1 (en) * | 2017-01-12 | 2018-07-12 | Bayerische Motoren Werke Aktiengesellschaft | Charging cable for an electrically operable motor vehicle |
JP7405709B2 (en) * | 2020-07-13 | 2023-12-26 | 株式会社Subaru | Vehicle communication device connection determination system |
JP2022118597A (en) * | 2021-02-02 | 2022-08-15 | 株式会社オートネットワーク技術研究所 | On-vehicle relay device, abnormality determination system, abnormality determination method, and program |
EP4382351A1 (en) * | 2022-12-07 | 2024-06-12 | ABB E-mobility B.V. | Detection of an electric vehicle via a two-line bus termination |
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Also Published As
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WO2013084998A1 (en) | 2013-06-13 |
US20140355452A1 (en) | 2014-12-04 |
JPWO2013084998A1 (en) | 2015-04-27 |
CN104105623B (en) | 2017-06-23 |
JP5976674B2 (en) | 2016-08-24 |
EP2789509A4 (en) | 2015-12-23 |
EP2789509B1 (en) | 2017-05-24 |
CN104105623A (en) | 2014-10-15 |
EP2789509A1 (en) | 2014-10-15 |
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